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照片由Nitto Construction Co.提供,在与传统的篮板锤设计的背景下,由日本建筑公司开发的测试锤具有内置加速度计,可为其计算提供基线。由一家希望改善非破坏性测试工具的日本建筑公司开发的电子混凝土测试锤,现已在美国市场上与国家产品代表一起使用。1999年,混凝土分层后开始开发锤子,并在Sanyo高速铁路隧道中坠落。
建筑行业的参与者和其他精密全球位置系统(GPS)的主要用户说,一个行业工作组发布的一份新报告今天证实,Lightsquared提出的无线宽带网络将对全球使用的大多数GPS设备造成重大伤害。Rendering of LightSquared's latest satellite. Related Links: FCC Announces Comment Period for TWG Report Save Our GPS Coalition Press Releases LightSquared's Press Release Efforts 'To Save Our GPS' Heat up in Congress The group also rejected a three-pronged proposal put forth by Reston, Va-based LightSquared, which it says would mitigate any interference the company's
A fight over a 4G network and competitor to the Global Positioning System is heating up in Washington, as a coalition that includes major construction industry groups and heavy-equipment manufacturers is trying to block a move by LightSquared, Reston, Va., to launch a wireless broadband network. An industry group called the Coalition to Save Our GPS contends that the LightSquared plan would involve building some 40,000 ground stations and create interference with the existing GPS signals, which would disrupt systems such as high-precision GPS used in dredging operations in U.S. ports, as well as GPS that is used to guide